Add OpenBSD termios constants to std.c.openbsd (#10178)

lib/std/c/openbsd.zig

@@ -703,6 +703,133 @@ pub const T = struct {
     pub const IOCXMTFRAME = 0x80087444;
 };
 
+// Term
+const V = struct {
+    pub const EOF = 0; // ICANON
+    pub const EOL = 1; // ICANON
+    pub const EOL2 = 2; // ICANON
+    pub const ERASE = 3; // ICANON
+    pub const WERASE = 4; // ICANON
+    pub const KILL = 5; // ICANON
+    pub const REPRINT = 6; // ICANON
+    //  7    spare 1
+    pub const INTR = 8; // ISIG
+    pub const QUIT = 9; // ISIG
+    pub const SUSP = 10; // ISIG
+    pub const DSUSP = 11; // ISIG
+    pub const START = 12; // IXON, IXOFF
+    pub const STOP = 13; // IXON, IXOFF
+    pub const LNEXT = 14; // IEXTEN
+    pub const DISCARD = 15; // IEXTEN
+    pub const MIN = 16; // !ICANON
+    pub const TIME = 17; // !ICANON
+    pub const STATUS = 18; // ICANON
+    //  19      spare 2
+};
+pub const NCCS = 20;
+
+// Input flags - software input processing
+pub const IGNBRK = 0x00000001; // ignore BREAK condition
+pub const BRKINT = 0x00000002; // map BREAK to SIGINT
+pub const IGNPAR = 0x00000004; // ignore (discard) parity errors
+pub const PARMRK = 0x00000008; // mark parity and framing errors
+pub const INPCK = 0x00000010; // enable checking of parity errors
+pub const ISTRIP = 0x00000020; // strip 8th bit off chars
+pub const INLCR = 0x00000040; // map NL into CR
+pub const IGNCR = 0x00000080; // ignore CR
+pub const ICRNL = 0x00000100; // map CR to NL (ala CRMOD)
+pub const IXON = 0x00000200; // enable output flow control
+pub const IXOFF = 0x00000400; // enable input flow control
+pub const IXANY = 0x00000800; // any char will restart after stop
+pub const IUCLC = 0x00001000; // translate upper to lower case
+pub const IMAXBEL = 0x00002000; // ring bell on input queue full
+
+// Output flags - software output processing
+pub const OPOST = 0x00000001; // enable following output processing
+pub const ONLCR = 0x00000002; // map NL to CR-NL (ala CRMOD)
+pub const OXTABS = 0x00000004; // expand tabs to spaces
+pub const ONOEOT = 0x00000008; // discard EOT's (^D) on output
+pub const OCRNL = 0x00000010; // map CR to NL
+pub const OLCUC = 0x00000020; // translate lower case to upper case
+pub const ONOCR = 0x00000040; // No CR output at column 0
+pub const ONLRET = 0x00000080; // NL performs the CR function
+
+// Control flags - hardware control of terminal
+pub const CIGNORE = 0x00000001; // ignore control flags
+pub const CSIZE = 0x00000300; // character size mask
+pub const CS5 = 0x00000000; // 5 bits (pseudo)
+pub const CS6 = 0x00000100; // 6 bits
+pub const CS7 = 0x00000200; // 7 bits
+pub const CS8 = 0x00000300; // 8 bits
+pub const CSTOPB = 0x00000400; // send 2 stop bits
+pub const CREAD = 0x00000800; // enable receiver
+pub const PARENB = 0x00001000; // parity enable
+pub const PARODD = 0x00002000; // odd parity, else even
+pub const HUPCL = 0x00004000; // hang up on last close
+pub const CLOCAL = 0x00008000; // ignore modem status lines
+pub const CRTSCTS = 0x00010000; // RTS/CTS full-duplex flow control
+pub const CRTS_IFLOW = CRTSCTS; // XXX compat
+pub const CCTS_OFLOW = CRTSCTS; // XXX compat
+pub const MDMBUF = 0x00100000; // DTR/DCD hardware flow control
+pub const CHWFLOW = (MDMBUF | CRTSCTS); // all types of hw flow control
+
+pub const tcflag_t = c_uint;
+pub const speed_t = c_uint;
+pub const cc_t = u8;
+
+pub const termios = extern struct {
+    iflag: tcflag_t, // input flags
+    oflag: tcflag_t, // output flags
+    cflag: tcflag_t, // control flags
+    lflag: tcflag_t, // local flags
+    cc: [NCCS]cc_t, // control chars
+    ispeed: c_int, // input speed
+    ospeed: c_int, // output speed
+};
+
+// Commands passed to tcsetattr() for setting the termios structure.
+pub const TCSA = struct {
+    pub const NOW = 0; // make change immediate
+    pub const DRAIN = 1; // drain output, then change
+    pub const FLUSH = 2; // drain output, flush input
+    pub const SOFT = 0x10; // flag - don't alter h.w. state
+};
+
+// Standard speeds
+pub const B0 = 0;
+pub const B50 = 50;
+pub const B75 = 75;
+pub const B110 = 110;
+pub const B134 = 134;
+pub const B150 = 150;
+pub const B200 = 200;
+pub const B300 = 300;
+pub const B600 = 600;
+pub const B1200 = 1200;
+pub const B1800 = 1800;
+pub const B2400 = 2400;
+pub const B4800 = 4800;
+pub const B9600 = 9600;
+pub const B19200 = 19200;
+pub const B38400 = 38400;
+pub const B7200 = 7200;
+pub const B14400 = 14400;
+pub const B28800 = 28800;
+pub const B57600 = 57600;
+pub const B76800 = 76800;
+pub const B115200 = 115200;
+pub const B230400 = 230400;
+pub const EXTA = 19200;
+pub const EXTB = 38400;
+
+pub const TCIFLUSH = 1;
+pub const TCOFLUSH = 2;
+pub const TCIOFLUSH = 3;
+pub const TCOOFF = 1;
+pub const TCOON = 2;
+pub const TCIOFF = 3;
+pub const TCION = 4;
+
 pub const winsize = extern struct {
     ws_row: c_ushort,
     ws_col: c_ushort,